Gist RubyGem before 6.1.0 Disabled TLS Certificate Verification
The gist RubyGem before 6.1.0 contains an improper certificate validation vulnerability that allows on-path attackers to intercept HTTPS traffic because http_connection in lib/gist.rb sets VERIFY_NONE. Attackers can present any certificate to read or modify GitHub API traffic, stealing OAuth tokens and login credentials to read and modify the victim's gists.
CVE-2026-105221
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-105221
gist
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "defunkt",
"product": "gist",
"versions": [
{
"status": "affected",
"version": "4.0.0",
"lessThan": "6.1.0",
"versionType": "semver"
}
],
"packageURL": "pkg:gem/gist",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-105221
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #8942 · Revision 1
- Added to Heist Feed
- Publisher date